Netboot hook is broken

It appears that since !3819 most UIs (all with NetworkManager?) you try to use with Netboot won't boot because networkmanager is resetting the networking connection, also breaking the nbd connection for the rootfs at the same time. This will make the boot hang somewhere in the openrc phase, and at some point failing with a bunch of I/O errors.

Reverting the before mentioned MR "resolves" the problem for now: 0001-Revert-main-postmarketos-base-ui-enable-USB-tetherin.patch

CC @dylanvanassche

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